The bulk of the hiring will be for technology-related positions, with the company intending to hire 350 to 400 new people in this area. The new hires represent a larger plan to bring on 1,000 new employees across the country, the source noted.

The hiring in Chicago is set to take place over the next five years, with CEO Kevin McCarty noting that the company intends to recruit about 100 new employees each year. West Monroe Partners also plans to expand its office space in Chicago by 35,000 square feet in January.

Some 43,000 people work in management consulting in Chicago's Cook County, a 17 percent increase from 2012.

Professional and technical services employment across the U.S. continued to increase in August, according to the Bureau of Labor Statistics' Employment Situation Summary released today. The sector added 22,000 jobs during the month, bringing the total number of jobs gained over the last year to 262,000. Some 8,000 jobs were added in computer systems design and related services.

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